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Outgassing and degradation of polyimide induced by swift heavy ion irradiation at cryogenic temperature

Severin, Daniel and Balanzat, E. and Ensinger, Wolfgang and Trautmann, C. (2010):
Outgassing and degradation of polyimide induced by swift heavy ion irradiation at cryogenic temperature.
In: Journal of Applied Physics, 108 (2), pp. 024901. American Institute of Physics, ISSN 0021-8979,
[Article]

Abstract

Polyimide foils were irradiated with energetic Kr (740 MeV) and Pb (890 MeV) ions at cryogenic temperature (12 K). Beam-induced degradation processes were monitored by residual gas analysis and online infrared spectroscopy. The outgassing components observed at low irradiation temperatures differ in quantity but are similar in mass distribution to those identified at room temperature exposure. Besides CO as major volatile fragment, a significant contribution of short hydrocarbons like C2Hx is released. In situ infrared spectroscopy indicates accumulation of CO and CO2 molecules at 12 K in the foils. During heat-up cycles, most of these frozen gases become mobile and outgas at a temperature between 35 and 55 K. The study is motivated by the application of polyimide foils as insulating material in high radiation environment of the future accelerator facility for antiproton and ion research (FAIR).

Item Type: Article
Erschienen: 2010
Creators: Severin, Daniel and Balanzat, E. and Ensinger, Wolfgang and Trautmann, C.
Title: Outgassing and degradation of polyimide induced by swift heavy ion irradiation at cryogenic temperature
Language: English
Abstract:

Polyimide foils were irradiated with energetic Kr (740 MeV) and Pb (890 MeV) ions at cryogenic temperature (12 K). Beam-induced degradation processes were monitored by residual gas analysis and online infrared spectroscopy. The outgassing components observed at low irradiation temperatures differ in quantity but are similar in mass distribution to those identified at room temperature exposure. Besides CO as major volatile fragment, a significant contribution of short hydrocarbons like C2Hx is released. In situ infrared spectroscopy indicates accumulation of CO and CO2 molecules at 12 K in the foils. During heat-up cycles, most of these frozen gases become mobile and outgas at a temperature between 35 and 55 K. The study is motivated by the application of polyimide foils as insulating material in high radiation environment of the future accelerator facility for antiproton and ion research (FAIR).

Journal or Publication Title: Journal of Applied Physics
Journal volume: 108
Number: 2
Publisher: American Institute of Physics
Uncontrolled Keywords: carbon compounds, cryogenics, infrared spectra, ion beam effects, outgassing, polymer films, spectrochemical analysis
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 24 Aug 2010 15:44
Official URL: http://link.aip.org/link/JAPIAU/v108/i2/p024901/s1&Agg=doi
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